# age = int(input('please enter your age:'))
# if age >= 18:
#     print('adult')
# else:
#     print('teenager')

n = 123
f = 456.789
s1 = 'Hello, world'
s2 = 'Hello, \'Adam\''
s3 = r'Hello, "Bart"'
s4 = r'''Hello,
Bob!'''

print(n,f,s1,s2,s3,s4) #打印时逗号会变成空格